Comment by denial

Something minor I always wonder about when I read Mamba is the discretization.

All of the sources I see referred to as derivations of it have a discretization of the form

h_t =Ah_{t-1} + Bx_{t-1} for the first line instead of the given one of the form h_t =Ah_{t-1} + Bx_t.

Does anyone know why this is?